| 摘要: |
| 对于卡尔文循环的调控机理,多数学者认为:①FDPase,SDPase 和 Ru5PK 是ATP 和 NADPH 产生驱动作用的位点;②[CO2]/[O2]通过增强 Rubjsco 的羧化活性而促进CO2同化。本文用数学模型证明第一个假设是错误的,而仅由后一个假设也不能解释 CO2对卡尔文循环的促进作用。作者根据对数学模型的分析补充两个假设:①ATP 的驱动位点是在输出反应之中而不在循环内部;②RuBP 对输出反应有反馈抑制。据此计算出的调控规律与实验相符。这说明在卡尔文循环中尚有未被发现的调控机理,也说明数学模型是研究调控规律的必需工具 |
| 关键词: 光合作用 卡尔文循环 调控机理 数学模型 |
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| A STUDY OF THE REGULATORY MECHANISMS OF THE CALVIN CYCLE WITH A MATHEMATICAL MODEL |
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| Abstract: |
| A mathematical model is proposed to examine the validity of current hypotheses about the regulatory mechanisms in photosynthesis.It is a system of equations based upon well accepted knowledge about the Calvin cycle.The kinetic properties of Ru5PK,FDPase and SDPase are especially expressed according to the known experimental facts.Regulatorybebaviours of the photosynthetic system under different environmental conditions can be obtained from the steady state solutlon of the model.Important contradictions betw... |
| Key words: photosynthesis Calvin cycle regulatory mechanism mathematical model |
